@gd2@chaos.social
@gd2@chaos.social avatar

gd2

@gd2@chaos.social

he/him | Breaker of Harddrives, First of his name | Addicted to tiling window managers but deeply disappointed by their (lack of) vision.

This profile is from a federated server and may be incomplete. Browse more on the original instance.

astrid, to random
@astrid@fedi.astrid.tech avatar
gd2,
@gd2@chaos.social avatar

@astrid
> $command --help
Successfully created new thing "--help"

gsuberland, to random
@gsuberland@chaos.social avatar

interesting thing of note: if you're looking to buy a GaN USB-C charger above 75W, compare the price-per-watt to a few 65W ones.

chargers above 75W are required to have an active PFC stage, typically requiring four more transistors and a fancier controller, which adds cost, so you can often tell if they're penny-pinching on the design if the price-per-watt is close to that of a 65W one. you should expect to see at least a 20% price-per-watt jump if they're doing it right.

gd2,
@gd2@chaos.social avatar

@gsuberland What confuses me is that even with the more expensive and more powerful models, they never have a ground pin?

Does GaN not have leakage current or is there just no market demand for it anymore? Sorry if this makes no sense, I have zero knowledge about physics 😬

gd2,
@gd2@chaos.social avatar

@gsuberland I've read before that DC chargers like these don't require ground to be safe, but I thought the ground pin on (some) laptop chargers was put there to get rid of that "tingly feeling" when your laptop has a metal body?

I can only parrot dubious internet articles here, I've read that this feeling is caused by a tiny unavoidable leakage current in the power supply, which is harmless but can be countered by grounding the chassis?

gd2,
@gd2@chaos.social avatar

@gsuberland Wait, but my laptop charger (the standard Lenovo 65W brick, Schuko plug) is USB-C and it does get rid of the effect, as does using my USB4 dock or just plugging in my Screen via USB-C-to-DisplayPort. Only charging the laptop via an ungrounded Apple or phone charger causes this effect; and it even goes away then upon connecting the Screen?

gd2,
@gd2@chaos.social avatar

@gsuberland Oh, OK, I read it as "you don't have a separate chassis ground line with USB-C", this makes more sense now 😅

So the laptop charger and docking station probably have this feature for brand value but 3rd-party vendors so far have no incentive to incur the extra costs?

But I'm surprised that the screen grounds my laptop then, I don't even think its PSU supplies an extra ground pin (barrel jack)... Could my laptop be grounded indirectly via the tower PC also connected to the screen?

gd2,
@gd2@chaos.social avatar

@gsuberland I've had an ungrounded macbook visibly discharge (sparks) via the same screen once, is that due to the circuit in the PC being designed for different voltages or amperages? Or is that entirely unrelated?

gd2,
@gd2@chaos.social avatar

@gsuberland Yeah, I discounted it as "something like static charge" when it first happened, but I am still glad that the grounded docking station prevents it now 😅

I also guess I'll be sticking with the laptop charger for now, the space savings of GaN are nice, but I don't like the feeling of the leakage current. Luckily my laptop also seems to do enough USB-PD to daisy-chain things from there.

Thanks for the patient explainers by the way, I learned a lot today!

gsuberland, to random
@gsuberland@chaos.social avatar

I just saw an article where someone described their product as having "the ease of configuration and setup as Docker" and I can only assume they are referring to a different piece of software that also happens to be called docker

gd2,
@gd2@chaos.social avatar

@gsuberland https://packages.debian.org/bookworm/docker

scy, to debian
@scy@chaos.social avatar

hmmm since I'll be using anyway, I might as well use systemd-boot instead of grub … 🤔

gd2,
@gd2@chaos.social avatar

@scy @dunkelstern Wait, how so, is there a pre-signed GRUB? sd-boot should also work with shim if you are referring to that, though I never tried it.

Self-signing is advantageous (in your case) though, as that is probably the only way you can verify your initramfs as well?

gd2, (edited )
@gd2@chaos.social avatar

@scy @dunkelstern Ah sorry, then I skipped a lot of steps in my initial reply.

So from the wiki page, only shim is signed by Microsoft, the others (including GRUB) are signed by Debian, which tracks with what I know. So the Microsoft signed shim is required if you want to use SB but not roll your own keys, as most consumer hardware has only the Microsoft CA installed and not the Debian one. Instead, shim contains the Debian CA and then verifies the Debian signed GRUB, I believe. [1/3]

pid_eins, to random
@pid_eins@mastodon.social avatar

1️⃣0️⃣ Here's the 10th installment of posts highlighting key new features of the upcoming v256 release of systemd.

You might be aware of systemd-sysext: a component of systemd that can overlay immutable disk images (DDIs) on top of /usr/, to extend it in a secure, and again, immutable fashion. It has a companion tool systemd-confext that does the same over /etc/.

gd2,
@gd2@chaos.social avatar

@pid_eins Honest question, do you know any OS apart from Flatcar that actually follows this model? I know that I could build one with mkosi, but I'd be interested in trying out existing ones before going down that route. (And Flatcar targets a very specific use case which I don't have yet.)

gsuberland, to random
@gsuberland@chaos.social avatar

ugh I hit the KB5028997 issue with recovery partition size, this is going to be annoying to fix

gd2,
@gd2@chaos.social avatar

@gsuberland There is a fix?

gd2,
@gd2@chaos.social avatar

@gsuberland Oh, but I have no recovery partition to begin with (and automatically assumed you were the same)...

shaft, to random French
@shaft@piaille.fr avatar

Is there any known implementation of 1149 not using columbidae (pigeons or doves)? Because the RFC does say avian carriers, meaning any bird could transport IP. That would bring passionate debates about the differences of MTU between African and European swallow 😬

gd2,
@gd2@chaos.social avatar

@shaft If packet sizes vary greatly, will they also arrive out of order? 🤔

bsi, to random German
@bsi@social.bund.de avatar

Handy weg? 😱 Festplatte gehackt? 😱 Laptop ins Wasser gefallen? 😱
Mit nur halb so wild.

Am besten regelmäßig! Geht mit unserer Anleitung ganz fix: 👉 https://www.bsi.bund.de/dok/1101372

gd2,
@gd2@chaos.social avatar

@bsi Ich hätte Feedback falls ihr interessiert seid: Bei Android fehlt mir etwas der Hinweis dass diese Art Backup für einen evtl. großen Teil der Apps nicht funktioniert weil viele Apps da opt-out machen; entweder um nicht in der Google-Cloud zu landen oder weil Inhalte oder Funktionen tatsächlich kryptografisch an die Hardware gebunden sind. Manche Apps bieten gar keine Backup-Lösung an, Andere (gerade Chat) haben eigene Implementierungen.

whitequark, to random
@whitequark@mastodon.social avatar

waiting for brunch (i am building android again)

gd2,
@gd2@chaos.social avatar

@whitequark Could you share your patches for that? I'd like to sanity check that my attempts to enable dm-verity actually do anything 😅

  • All
  • Subscribed
  • Moderated
  • Favorites
  • •
  • JUstTest
  • kavyap
  • DreamBathrooms
  • ngwrru68w68
  • Durango
  • mdbf
  • magazineikmin
  • everett
  • thenastyranch
  • rosin
  • Youngstown
  • slotface
  • khanakhh
  • osvaldo12
  • megavids
  • GTA5RPClips
  • tacticalgear
  • cubers
  • modclub
  • tester
  • InstantRegret
  • ethstaker
  • cisconetworking
  • anitta
  • provamag3
  • Leos
  • normalnudes
  • lostlight
  • All magazines
    •